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Illustration: Rae Cook/Axios

Slow global COVID-19 vaccination rates are raising concerns that worse variants of the coronavirus could be percolating, ready to rip into the world before herd immunity can diminish their impact.

Why it matters: The U.S. aims to at least partially vaccinate 70% of adults by July 4, a move expected to accelerate the current drop of new infections here. But variants are the wild card, and in a global pandemic where only about 8% of all people have received one dose, the virus will continue mutating unabated.

"There's been hyper-accelerated evolution of the virus in recent months. The virus was kind of stable for 10 months, and then it started getting into this accelerated evolution. Now, the real question is, is there any way for it to get any worse?"
— Eric Topol, founder and director, Scripps Research Translational Institute

How it works: Viruses mutate and selective pressure can favor those mutations that transmit easier in the population or that better escape human's innate immunity, says Sarah Cobey, associate professor of ecology and evolution at the University of Chicago.

  • "We're seeing both right now," she says.
  • It's unclear if SARS-CoV-2 will evolve in the long term as the type of virus that branches out into multitudes of variants that coexist or if it will have more of a replacement pattern, Cobey adds.
Expand chart
Screenshot from the live Axios Coronavirus Variant Tracker. Chart: Will Chase/Axios

Where it stands: The CDC currently says there are five variants of concern and eight variants of interest in the United States.

  • Two variants of concern — New York and California — may be dropping off and "on their way to extinction," Topol says.
  • Three variants raise more worries — those originally discovered in the U.K. (B.1.1.7), Brazil (P.1) and South Africa (B.1.351) — partly because "they accrued many mutations, over a dozen, almost instantaneously," says Josh Schiffer, an infectious disease expert at Fred Hutchinson Cancer Research Center.
  • These three variants show varying levels of increased infectiousness, particularly B.1.1.7. Plus, P.1 and B.1.351 may be more able to evade the immune system or vaccination properties, Schiffer adds, although more data is needed.
  • The CDC is closely watching several versions of B.1.617, a variant first detected in India that may be linked to the surge in cases there now.

"We were lucky because we vaccinated ahead of the onslaught [of the U.K. strain]. Otherwise we would have been in trouble. That's the superspreader strain," Topol says.

  • Schiffer agrees partial herd immunity is causing the level of new infections in the U.S. to drop despite the highly infectious B.1.1.7's prevalence. "In the absence of vaccination, it's very likely that many places in the United States would look exactly like India right now with the new variants."
  • "We're clearly seeing really pronounced signals of positive selection for increased transmissibility and what looks like some amount of immune escape," although this was not unexpected, Cobey adds.

What to watch: "Rapid vaccination is critically important. ... Even with partial protection you can achieve higher degrees of herd immunity," Schiffer says. "When I think of herd immunity, I don't think of it as an all-or-none phenomenon. I think of it as a dimmer switch."

  • "The factories for generating new variants are areas that are getting hit very hard. If there is a new variant that's terrible — that ruins 2022 and brings us back to very dark times — it's almost a guarantee that it's percolating in an area of the world that's getting hit very hard now," Schiffer says.
  • "The one thing that could happen, but hasn't happened yet, is to have a superspreader variant like B.1.1.7 with very powerful immune evasion. ... Will we see that? I don't know. Hopefully we'll never see that monster," Topol says.

Yes, but: The U.S. appears to be experiencing a drop in vaccination demand, despite the spread of variants.

  • A new study in The New England Journal of Medicine shows the importance of people getting their second dose in fighting off the variants — but some Americans are not taking this step.
  • And foreign nations are struggling to get access to vaccines, with the U.S. only now starting the process to fill in the vaccine diplomacy void.

The bottom line: "It's just next to impossible to predict what's going to happen next," Schiffer says.

  • "I think the likelihood that we would have a variant that emerges that is worse than the ones we're dealing with now is much higher if you have a higher circulating number of infections," such as what's happening in Latin America, India and Asia.

Go deeper:

Editor's note: This piece was updated to clarify how viruses mutate.

Go deeper

Aug 15, 2021 - Health

Man stabbed at Los Angeles City Hall COVID vaccine protest

Anti-vaccination protesters surround a counterprotester during an anti-vaccination rally near City Hall in Los Angeles on Saturday. Photo: David McNew/AFP via Getty Images

A man was stabbed and a journalist said he was assaulted during a protest against COVID-19 vaccinations outside Los Angeles' City Hall on Saturday.

Driving the news: A fight broke out after several hundred demonstrators rallied outside the City Hall and a small group of counterprotesters gathered nearby about 2pm local time, per the Los Angeles Times.

Exclusive: Biden administration raises minimum wage for federal employees to $15

A poster demanding a federal $15-per-hour minimum wage seen near the White House in Washington, D.C. on Feb. 26, 2021. Photo: Erin Scott/Bloomberg via Getty Images

Federal agencies are being directed to raise the minimum wages for government employees to $15 an hour, according to new guidance from the Office of Personnel Management shared first with Axios.

Why it matters: The guidance will impact almost 70,000 federal employees, most of which work at the Departments of Agriculture, Defense and Veterans Affairs. OMP is directing agencies to implement the new wage by Jan. 30.

Kate Marino, author of Markets
1 hour ago - Economy & Business

The Federal Reserve is open to creating a digital dollar

Illustration: Aïda Amer/Axios

The Federal Reserve finally released a much-delayed paper yesterday opining on the pros and cons of developing its own central bank digital currency (CBDC), but without coming to any firm conclusions.

Why it matters: Around the world, there are now 23 CBDCs either in pilot or formally launched. They have morphed from a theoretical concept into real-world digital cash, changing the way governments and millions of people use money — but not in the U.S.